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Finding the Third Proportional to 31,743 and 68,949

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Solution

The third proportional to 31,743 and 68,949 is: 149,764.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,743 : 68,949 = 68,949 : x
  2. Step 2: Convert to fraction form
    31,743/68,949 = 68,949/x
  3. Step 3: Cross multiply
    31,743x = 68,949 × 68,949
  4. Step 4: Simplify right side
    31,743x = 4,753,964,601
  5. Step 5: Solve for x
    x = 4,753,964,601/31,743
  6. Step 6: Final answer
    x = 149,764.19

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.